Mona Al-Terehi1, Saadi Shershab2Hadeel Alaa Al-Rrubaei3 and Ali H. Al-Saadi1

 1University of Babylon, College of Science, 2Al-Hilla University College, Dentist Department, 3 University of Babylon, DNA Research Center, Iraq.


The microbial community in oral cavity associated with oral infection and disease, variety of microbes have been recorded in oral  cavity with different genetic properties, the present study aims to study some oral cavity isolates using classical methods and PCR for molecular detection O-antigen genes, results show that there were four isolates, three were G- E. coli ; Klebsilla pneumonia and Cardiobacterium  hominis   while  the fourth  species was Staphylococcus aureaus , it had different response to antibiotics E. coli  and  Klebsilla pneumonia were more resistance. The plasmid profile didn’t show any plasmids as well as O- antigen genes it was negative for all isolates. The present study concluded that oral cavity have variety species with different genomic properties , it need more investigation about other genes and bioactivity.

Keywords: Oral cavity, O-antigen, plasmid profile.